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Marquise|Natural|GIA

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • GIA 2564139739

Certificate GIA 2564139739

Diamond specifications and retailer prices

From £415 GBP
SGD 752 SGD
As of November 1, 2026
Save £318 GBP (43%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £733 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2564139739. Listed at 5 retailers as of November 1, 2026, with prices from £415 to £733, a £318 spread on the same certified stone. Frank Darling lists it at £733. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
G
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564139739
Dimensions7.89 × 4.14 × 2.61 mm
L/W Ratio1.91
Culet sizeNone
Top View
7.89 mm4.14 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2564139739
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £733 GBP|Low: £415 GBP|High: £741 GBP|Avg: £552 GBP|-1.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6£415 GBP
Retailer 3£425 GBP
Retailer 8£433 GBP
Retailer 2£488 GBP
Retailer 4£540 GBP
Retailer 9£596 GBP
Retailer 7£616 GBP
Retailer 5£623 GBP
Frank Darling£733 GBP

19 data points across 9 retailers

5 retailers£415 GBP to £733 GBP

A
Cheapest Retailer
-
£415 GBP
SGD 752 SGD
Retailer 2
-
£425 GBP
$570 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£488 GBP
View
Retailer 4
-
£623 GBP
$836 USD
View
Price last confirmed 17 days ago
Most Expensive
B
Frank Darling
2679425HK · Nov 2
£733 GBP
$984 USD
View
4 more retailers have this diamond
Prices start from £415 GBPSave up to £318 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Marquise
£415 GBP